Chaining javascript functions. What's the order of execution?

Question

aka if I have a function var nameNorm= name.substring(1).toLowerCase();

what would the order be? would it turn everything lowercase then extract a substring or would it extract a substring and then turn the substring lowercase?

This really has nothing at all to do with prototypes, at least in any direct way. It's about the syntactic binding of operators in the expression grammar. — Pointy
– Pointy, Commented Jul 13, 2014 at 3:12

Scott Sauyet · Accepted Answer · 2014-07-13 03:11:19Z

11

The . operator associates left-to-right.

so you would do the substring first, then the lower case.

answered Jul 13, 2014 at 3:11

Scott Sauyet

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2 Comments

Ari Shojaei Over a year ago

can we decide about the order in name(), in case we want to receive same result with any order?

Scott Sauyet Over a year ago

@AriShojaei: I'm afraid I don't understand the question. name here is not a function.

Robert Harvey · Accepted Answer · 2014-07-13 03:11:03Z

8

It executes from left to right. So substring(1) executes, then toLowerCase() executes on the resulting substring.

answered Jul 13, 2014 at 3:11

Robert Harvey

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